Whirlpool Dishwasher Error Code 8-3

Error code 8-3 means the control board has detected that the drain circuit is stuck in the ON position. The drain motor or its relay is being read as continuously energized when it should be cycling off. This points to either a faulty control board or a drain motor and wiring harness with evidence of overheating or shorting.

Running the dishwasher with an active 8-3 code is not recommended. A drain circuit that is stuck on can indicate a shorted motor or a failing control board relay, both of which present a risk of further electrical damage or overheating. Disconnect power to the unit until the cause is identified and repaired.

Yes. The control board contains the relay that switches the drain motor on and off. If that relay fails in the closed position, the board will continuously power the drain circuit and log error code 8-3 even when the motor itself is in good condition. If the drain motor and wiring show no signs of damage after inspection, replacing the control board is the correct next step.

Start by unplugging the dishwasher, then inspect the drain motor and its wiring connections for any signs of overheating, melted insulation, or burn marks. If you find physical damage, replace the drain motor and any damaged wiring. If the motor and connections look intact, the control board has likely failed and needs to be replaced. Control board replacement is a moderate DIY repair, but if you are not comfortable working with appliance wiring, a technician can complete this job efficiently.

If the drain motor is the cause, replacement motors typically range from $30 to $80 for the part, and the repair is manageable for a DIYer comfortable with appliance work. If the control board needs replacement, parts generally cost between $100 and $250 depending on the model. Adding professional labor, expect a total repair bill of $150 to $400. Checking the drain motor and wiring first is worthwhile since it is the lower-cost fix.